Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Can I tunnel 802.1q tagged frames over 'untagged' network

So maybe the title is not that descriptive, here's what I want to do :

We use a carrier supplied network to connect a bunch of remote sites. This network does not support tagged ethernet frames, so we cannot propogate VLANS out to these sites. To impliment Clean Access we will need to support a variety of VLANS at these sites. Is there any way to tunnel tagged frames within an ethernet network that only supports untagged frames ? I've looked into L2TP but it does not seem to support this requirement. Any ideas ? Note that the end devices are currently a 6500 at the central site and 2950s at the remotes. If needed we would look at upgrading to 3550s or whatever.

Thanks in advance for any suggestions.

Dave

2 REPLIES
Purple

Re: Can I tunnel 802.1q tagged frames over 'untagged' network

Hi Dave,

Unless you are using some layer 3 infrastructure in the middle that supports Ethernet over MPLS or VPLS, I'm afraid that what you are asking is not possible. You will need to get some switches that support q-in-q.

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: Can I tunnel 802.1q tagged frames over 'untagged' network

Thanks for the reply Paresh, sorry I could only rate your post a 3 :)

Unfortunately the network I must traverse is a simple layer 2 ethernet network apparently built with low-end Cisco switches (old 1900s as I recall). These is not our network, it belongs to the telco. We have the privledge of using it in exchange for a little money. It looks like I need to ask the carrier to do an ugrade.

Thanks again,

Dave

200
Views
3
Helpful
2
Replies